Aad, G.Abajyan, T.Abbott, B.Abdallah, J.Abdel Khalek, S.Abdinov, O.Aben, R.Izen, Joseph M.Lou, XinchouReeves, KendallLeyton, MichaelNamasivayam, HarisankarATLAS Collaboration2014-10-162014-10-162014-07-102014-07-101550-2368http://hdl.handle.net/10735.1/4121A search is presented for production of dark-matter particles recoiling against a leptonically decaying Z boson in 20.3 fb⁻¹ of pp collisions at √s=8 TeV with the ATLAS detector at the Large Hadron Collider. Events with large missing transverse momentum and two oppositely charged electrons or muons consistent with the decay of a Z boson are analyzed. No excess above the Standard Model prediction is observed. Limits are set on the mass scale of the contact interaction as a function of the dark-matter particle mass using an effective field theory description of the interaction of dark matter with quarks or with Z bosons. Limits are also set on the coupling and mediator mass of a model in which the interaction is mediated by a scalar particle.en-USCC BY 3.0 (Attribution)©2014 CERN for the ATLAS Collaborationhttp://creativecommons.org/licenses/by/3.0/Z bosonsDark matter (Astronomy)Proton-proton interactionsStandard model (Nuclear physics)TextAad, G., T. Abajyan, B. Abbott, J. Abdallah, et al. 2014. "Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at √s=8 TeV with the ATLAS detector." Physical Review D - Particles, Fields, Gravitation and Cosmology 90(1), doi10.1103/PhysRevD.90.012004901